// Unselect all case study rows.
function testimonials_unselect_all() {
  var children = $('case_study_tbody').childNodes;
  for( var i = 0; i < children.length; i++) {
    if( children[i].nodeType == 1) {
      children[i].className='';
      var ndx = children[i].id.lastIndexOf('_');
      if( ndx != -1) {
	      var case_number = children[i].id.substr(ndx+1);
	      $('testimonials_carat_' + case_number).src='/images/common_elements/circle_carat.gif';
      }
    }
  }
}

// Set a case study row as selected.
function testimonials_selected_row( case_number) {
  testimonials_unselect_all();
  $('tr_case_' + case_number).className='on';
  $('testimonials_carat_' + case_number).src='/images/common_elements/circle_carat_on.gif';
}